Tide Alert is the #1 app for tide predictions, tidal currents, and lunar phases, all in one beautiful interface. Powered by NOAA tide forecasts, it delivers accurate high tide and low tide times, current speeds, slack tide windows, swell data, water temperature, and wind conditions for thousands of stations along the US coastline.

Set custom alerts for high tide, low tide, or any tide level you choose and never miss a window again. With full offline support, your tide data is always available, even without cell service.

What's New:

Tidal Currents & Slack Tides

View real-time tidal current speed overlayed on the tide chart.

See slack tide periods with estimated begin and end times.

Current data sourced from NOAA current prediction stations.

Compare Tide Charts

Compare multiple stations side by side.

Add stations to compare directly from the map.

Monthly High & Low

Redesigned monthly view with visual tide range bars.

See the month's lowest, highest, and average tidal range at a glance.

Apple Watch

New ocean conditions view with wind, swell height, water temperature, and current speed.

Tap the wave icon on the main screen to check conditions instantly.

Wind, Swell & Water Temperature

Hourly wind speed, gust, and direction forecasts.

Swell chart with height, period, and direction.

Water temperature from NOAA and Open-Meteo.

Who is Tide Alert for?

Anyone who needs to know the tides. Fishermen timing their catch. Surfers checking swell and tides together. Kayakers and paddleboarders planning safe launches. Boaters and sailors navigating harbors. Crabbers and clammers working low tides. Beach photographers chasing golden hour at low tide. Dog walkers, birdwatchers, and tide pool explorers. Divers planning slack water entries.

Key Features:

Tide predictions for thousands of NOAA stations across the US.

Tidal current speed and slack tide annotations on the chart.

Custom tide alerts — get notified for high tide, low tide, or any level.

Full offline access to tide data and charts for favorite stations.

Interactive map with station discovery and quick actions.

Compare tide charts across multiple stations.

Monthly high & low tide overview with daily range bars.

Wind, swell, and water temperature conditions.

Sunrise, sunset, moonrise, and moonset on the chart.

Moon phase calendar.

Apple Watch app with tide chart, conditions, and complications.

Home Screen, Lock Screen, and StandBy widgets.

iOS Shortcuts and Siri voice commands.

Customizable chart symbols and reference levels.

Supports all US time zones and daylight saving time.

Tide Alert is free to try with all features available during the trial period. After the trial, a subscription is required to continue.

DISCLAIMER — See https://tidealert.app/disclaimer.html

Use Tide Alert at your own risk. Tide data does not account for the effects of wind, storms, rain, freshwater runoff, or floods. The tide graph uses predicted high and low tide events with approximated segments between them. Do NOT use Tide Alert for NAVIGATION or any purpose that may result in personal injury or property damage. Tide Alert is not liable for any loss, injuries, or damage caused by its use. Tide Alert is not associated with NOAA.